The trip was expertly planned by Jo Thomas of Wild About Travel . Jo has a variety of trips itineraries in India and will also make you a custom trip. We got a first class service and excellent communication, which included a call the day before we left the UK just to see everything was OK and a call after to make sure we were happy.
The Eaglenest Biodiversity website (though a bit awkward to navigate) is a great place to get an overview of western Arunachal Pradesh and the immediate Eaglenest area.
You'll find loads of trip reports on the Surfbirds website.
Books:- Research any Indian trip with 'A birdwatchers guide to India' Kazmierczak. Though getting a bit out of date now, it's a must read for any lover of Indian birding.
Use Inskipp and/or volume 1 of the Ripley guide in the field and volume 2 of the Ripley guide in the vehicle for more detailed reference.